tracy

Popular questions and responses by tracy
  1. ENGLISH

    #speech. TopIc:afRican slaughter rituals should be allowed in the suburbs?

    asked on April 18, 2015
  2. Calculus

    evaluate the integral of dx/square root of 9-8x-x^2

    asked on November 19, 2011
  3. Chemistry

    Consider this system at equilibrium. A(aq) B(aq) Delta H = +750 kJ/mol .. What can be said about Q and K immediately after an increase in temperature? a] Q > K because Q increased.. b] Q>K because K decreased.. c] Q

    asked on March 5, 2012
  4. Chemistry

    Did I answer this equilibrium question correctly? 2CO(g) + O2(g) 2CO2(g) 1) How will increasing the concentration of CO shift the equilibrium? a] to the right [i chose this] b] to the left c] no effect 2] how will increasing the concentration of CO2 shift

    asked on March 5, 2012
  5. Business Math

    Nancy would like to accumulate $10,000 by the end of 3 years from now to buy a used car from her friend,Jin. She has $2,500 now and would like to save equal annual end of year deposits to pay for the car. Calculate how much should she deposit at the end of

    asked on July 1, 2017
  6. Chemistry

    In which direction will the net reaction proceed. X(g) + Y(g) Z(g) .. Kp = 1.00 at 300k for each of these sets of initial conditions? 1) [X] = [Y] = [Z] = 1.0 M a] net reaction goes to the left [this one?] b] net reaction goes to the right c] reaction is

    asked on March 5, 2012
  7. Chemistry

    At 389K, this reaction has a Kc value of 0.0682. 2X(g) + 2Y(g) Z(g) .. Calculate Kp at 389K. Kp= this is what I did.. can somebody confirm or find any mistakes in my thought process? Kp = Kc(R)(T)^Delta n Delta n = (1)-(2+2) = -3 Kp =

    asked on March 5, 2012
  8. STAT - Please check answer

    In a study, nine tires of a particular brand were driven on a track under identical conditions. Each tire was driven a particular controlled distance (measured in thousands of miles), and afterward the tread depth was measured. Tread depth is measured in

    asked on February 24, 2014
  9. Chemistry

    Methane (CH4) is the major component of natural gas. 2.5 moles of methane were placed in a commercial colorimeter and subjected to a combustion reaction. The reaction released 2800 kJ of energy. Compare this energy value to the energy values of paraffin

    asked on April 23, 2016
  10. physics

    How high will a 1.85 kg rock go if thrown straight up by someone who expends 80.0 J of energy on it?

    asked on September 29, 2012
  11. Math

    The 8 term of a g.p is 7/32

    asked on November 11, 2018
  12. Statistics

    In a study, nine tires of a particular brand were driven on a track under identical conditions. Each tire was driven a particular controlled distance (measured in thousands of miles), and afterward the tread depth was measured. Tread depth is measured in

    asked on February 25, 2014
  13. chem

    When the concentration of I2 is increased to 1.5 M, the ratio of products to reactants is 28. The equilibrium constant for the reaction is 83. In which direction will the reaction shift to regain equilibrium?

    asked on November 19, 2012
  14. chem

    An 80 proof brandy is 40.0% (v/v) ethyl alcohol. The "proof" is twice the percent concentration of alcohol in the beverage.How many milliliters of alcohol are present in 700mL of brandy?

    asked on November 8, 2012
  15. math

    a ladder reaches 12m up to a vertical wall and has a gradient of 4. how far is the bottom of the ladder from the wall

    asked on May 27, 2019
  16. Chemistry

    What is the enthalpy change if 25.0 g of methane are burned? 890kJ of heat released for every mole of methane that reacts. CH4 + 2O2 = CO2 + 2H2O

    asked on March 18, 2014
  17. STAT

    Calculate SP (the sum of products of deviations) for the following scores. Note: Both means are decimal values, so the computational formula works well. X Y 0 2 0 1 1 0 2 1 1 2 0 3 Assume a two-tailed test with  .05. (Note: The table does not list all the

    asked on March 3, 2013
  18. accounting

    kathy burnett works for trinity industries. Her pay rate is 12.84 per hour and receives overtime pay at one and one-half times her regular hourly rate for any hours worked beyond 40 in a week. During the pay period that ended December 31,2013, Kathy worked

    asked on June 15, 2012
  19. Chemistry

    At -15.0 C, what is the maximum mass of fructose (C6H12O6) you can add to 3.00 kg of pure water and still have the solution freeze? Assume that fructose is a molecular solid and does not ionize when it dissolves in water. I'm confused on how you pick the

    asked on February 16, 2012
  20. geometry

    The equal sides of an isosceles trapezoid each measure 5, and its altitude measures 4. If the area of the trapezoid is 48, find the lengths of its bases.

    asked on March 19, 2011
  21. chem

    Calculate the final concentration of a. 4.0 L of a 4.0 M HNO3 solution is added to water so that the final volume is 8.0L b. Water is added to 0.35L of a 6.0M KOH solution to make 2.0L of a diluted KOH solution. c.A 20.0 mL sample of 8.0% (m/v)NaOH is

    asked on November 8, 2012
  22. stat

    Explain why using the t statistic may be an appropriate alternative to using a z-score

    asked on February 5, 2013
  23. chem

    Zn^2+(aq) + 2OH^-(aq) ----> Zn(OH)2(s) a) how the addition of HCl affects the equilibrium? my answer is it will shift to the right b) how the addition of a small amount of NaOh affects the equilibrium?my answer is it will shift to the left c) how the

    asked on November 26, 2012
  24. chem

    The molar concentrations for the reactants and products at equilibrium are found to be [HCl] = 0.80 M, [O2] = 0.20 M, [Cl2] = 3.0 M, and H2O = 3.0 M. What is the value of the equilibrium constant for this reaction? the complete reaction is

    asked on November 19, 2012
  25. Calculus please help

    Find the centroid of the area bounded by the parabola y=4-x^2 and the x-axis A.(0,1.6) B.(0,1.7) C.(0,1.8) D.(0,1.9)

    asked on November 22, 2011
  26. physics

    Jack drops a stone from rest off of the top of a bridge that is 24.4 m above the ground. After the stone falls 6.6 m, Jill throws a second stone straight down. Both rocks hit the water at the exact same time. What was the initial velocity of Jill's rock?

    asked on August 30, 2014
  27. Stats

    The high temperature X (in degrees Fahrenheit) on January days in Columbus, Ohio varies according to the Normal distribution with mean 21 and standard deviation 10. The value of P(X < 10) is

    asked on March 29, 2014
  28. Math

    Use the following table to answer the questions. (Give your answers correct to two decimal places.) x 1 1 3 3 5 5 7 7 9 9 y 3 2 6 1 3 3 3 2 5 3 (a) Find the equation of the line of best fit. y hat = 2.6,.1x Correct: Your answer is correct. . + Correct:

    asked on June 28, 2013
  29. math

    Find the 95% confidence interval for the difference between two means based on this information about two samples. Assume independent samples from normal populations. (Use conservative degrees of freedom.) (Give your answers correct to two decimal places.)

    asked on June 26, 2013
  30. Elmentary Math for Teachers II

    From a set of eight marbles, five red and three white, we choose one at random. What are the odds in favor of choosing a red marble?

    asked on February 8, 2013
  31. Math

    Find the missing coordinate of p, using the fact that p lies on the unit circle in the given quadrant. P( ), -3/7

    asked on September 26, 2015
  32. Stats

    Assume that event A occurs with probability 0.4 and event B occurs with probability 0.5. Assume that A and B are disjoint events. The probability that either event occurs (A or B) is A. 0.0 B. 0.7 C. 0.9 D. 1.0.

    asked on March 29, 2014
  33. STATS

    Archaeologists often find only parts of ancient human remains. For example, they may find a small finger bone, called the metacarpal bone. Is it possible to predict the height of a human from the length of his or her metacarpal bone? To investigate, a

    asked on February 20, 2014
  34. Algebra

    Ozark furniture company can obtain at most 3000 board feet of maple lumber for making its classic and modern maple rocking chairs. A classic maple rocker requires 15 board feet of maple and a modern rocker requires 12 board feet of maple. write an

    asked on October 21, 2013
  35. chemistry

    invent a term to describe a certain number of something you use that isn't already being used. Define and explain

    asked on October 9, 2012
  36. chemistry

    how do you determine the last digit in any measured number?

    asked on September 16, 2011
  37. calculus

    Solve for all real values of x. 3tan^2x = 3^1/2 tan x I have no idea how to approach this problem.

    asked on January 24, 2010
  38. 4th grade science

    What parts of the world were covered with glaciers during the Ice Age?

    asked on September 14, 2008
  39. Inorganic Chemistry

    Hello, I am trying to write a chemical equation for a reaction I did and I cannot for the life of me figure out how to do it. I added cobalt chlorid hexahydrate, NH4Cl, NH4OH, H2O2 and HCl. The major product was [Co(NH3)5Cl]Cl2 but I don't know what the

    asked on November 18, 2007
  40. science

    About how long does it take for sound to travel 1 Km?

    asked on September 15, 2007
  41. Critical Thinking

    What is the meaning of validity, truth, and soundness as they relate to the area of logical syllogisms http://www.memoriapress.com/articles/logic.html scroll to Truth, Validity and Soundness What is the meaning of validity, truth and soundness as they

    asked on December 17, 2006
  42. Statistics

    Assume a study of 500 randomly selected school bus routes revealed 480 arrived on time. Is it significant for a school bus to arrive late?

    asked on October 23, 2016
  43. Algebra

    factoring 18z+45+z^2

    asked on May 6, 2014
  44. Algebra

    a line passes through the point (4,1) and has a slope -4 write an equation for this line

    asked on October 20, 2013
  45. Math

    In a survey of families in which both parents work, one of the questions asked was, "Have you refused a job, promotion, or transfer because it would mean less time with your family?" A total of 200 men and 200 women were asked this question. "Yes" was the

    asked on June 28, 2013
  46. statistics check

    Consider the following bivariate data. Point A B C D E F G H I J x 3 4 2 1 7 2 1 0 4 2 y 1 7 3 3 6 6 5 0 6 2 (b) Calculate the covariance. (Give your answer correct to two decimal places.) 5.35 was my answer . (c) Calculate sx and sy. (Give your answers

    asked on June 23, 2013
  47. world history

    To what did the U.S. Supreme Court case Brown v. Board of Education refer? A. women's rights in America B. racial segregation in American schools C. the 1960s counterculture in America D. American reaction to terrorist attacks I say B.

    asked on January 22, 2012
  48. world history

    What is true about the key German leaders who were responsible for the Holocaust? A. The Marshall Plan provided them with the opportunity to emigrate to the United States and avoid trial. B. The Potsdam Conference, held in Potsdam, Germany, revealed that

    asked on January 22, 2012
  49. computer sciece

    Let INFINITE PDA ={|M is a PDA and L(M) is an infinite language} Show that INFINITE PDA is decidable.

    asked on January 9, 2012
  50. MAth

    The sum of four consecutive integers is at least 114. Find the smallest possible values for these numbers. HOW YOU DO THIS?

    asked on December 25, 2011
  51. CALCULUS

    evaluate the integral of (e^3x)(cosh)(2x)(dx) A.(1/2)(e^5x)+(1/2)(e^x)+C B.(1/10)(e^5x)+(1/2)(e^x)+C C.(1/4)(e^3x)+(1/2)(x)+C D.(1/10)(e^5x)+(1/5)(x)+C

    asked on November 20, 2011
  52. english

    which of the following is not Abrahamic religion? a. christianity b. buddhism c. judaism. d. islam

    asked on November 9, 2011
  53. algebra,math

    Use the Pythagorean Theorem to find the missing side of the triangle. Round to the nearest tenth, if necessary. a = ?, b = 5, c = 8 A. 6.0 B. 6.1 C. 6.2 D. 6.3

    asked on October 24, 2011
  54. math

    why did everybody goto the boat show?

    asked on March 13, 2011
  55. math

    which has the greater area: a square with a side that measures 7 meters, or a 6-by-8 meter rectangle? what is the area?

    asked on January 13, 2011
  56. Chemistry

    Calculate the quantity of heat to convert 25.0g of ice at -10.0 degrees celcius to steam at 110.0 degrees celcius?

    asked on January 12, 2011
  57. Chemistry

    Analysis of a compound indicates that it is 49.02% carbon, 2.743% hydrogen, and 48.23% chlorine by mass. A solution is prepared by dissolving 3.150 grams of the compound in 25.00 grams of benzene, C6H6. Benzene has a normal freezing point of 5.50degreeC

    asked on January 10, 2011
  58. Chemistry

    Analysis of a compound indicates that it is 49.02% carbon, 2.743% hydrogen, and 48.23% chlorine by mass. A solution is prepared by dissolving 3.150 grams of the compound in 25.00 grams of benzene, C6H6. Benzene has a normal freezing point of 5.50degreeC

    asked on January 10, 2011
  59. math

    wei made two square pyramids and glued the congruent bases together, how many faces does here figure have?

    asked on January 4, 2011
  60. grammar

    My new coworker is actually quite nice

    asked on January 31, 2010
  61. math

    rich ran a 5 kilometer race how many meters is five kilometer

    asked on March 31, 2009
  62. Geometry

    Angle JKL is congruent to angle MNP, KL= 21x - 2, NP = 20x, LJ = 15x, PM = 13x + 4. Find LJ. I don't understand how to do it! Please, help! :)

    asked on January 28, 2009
  63. American History

    To what extent might the mid-19th century belief in Manifest Destiny set the stage for the New American Imperialism at the end of the century? Can anyone please give me some hints to do this question?THANKS A LOT!

    asked on February 4, 2008
  64. Algebra

    The amount of paint needed to cover the calls of a room varies jointly as the perimeter of the room and the height of the wall. If a room with a perimeter of 60 feet and 8-foot walls requires 4.8 quarts of paint, find the amount of paint needed to cover

    asked on July 5, 2018
  65. Science

    An object is placed 14cm from the convex lens. If this lens is of focal length 7cm determine the position and nature of image by graphical method.

    asked on February 25, 2018
  66. math

    find the no of terms in an AP given that its first and last terms are a and 37a respectively and that its common difference is 4a

    asked on December 30, 2017
  67. Math

    You visited your local bank. Because of your good credit, they agreed to give you a personal loan, simple interest at a current interest rate of 12.5% APR. you will pay this back in 1 year Interest=prt= Total Payment =Principle +interest = Payment per

    asked on March 8, 2017
  68. Math

    An open box is formed from a piece of cardboard 12 inches square by cutting equal squares out of the corners and turning up the sides. Find the volume of the largest box that can be made. Help!

    asked on February 6, 2017
  69. Chemistry of Life Science

    1. In the introduction to this experiment, it states that you reacted 2.5 grams of salicylic acid with an excess of acetic anhydride, meaning that there would be a higher number of moles of acetic anhydride then salicylic acid, proportionally. Assuming the

    asked on April 6, 2016
  70. Algebra

    You normally buy a crate of wine for $75. One crate has 6 bottles of wine. After a month, the store clerk informs you that the same crate of wine now costs $82. However, there are 7 bottles in a crate. To the nearest cent, determine the average cost of the

    asked on September 14, 2015
  71. solve math problem

    A group of 9 workers decides to send a delegation of 3 to their supervisor to dicusss their grievences. c.) If there are 4 women and 5 men in the group, how many delegations would include at least 1 women? I know I have to use combination C(9,1)x C(9,4)

    asked on April 10, 2015
  72. algebra

    5X2-3to the second power over [3to the second power-(-2)] to the second power. 5X2=10-9=1 9X2=18=134

    asked on January 25, 2015
  73. health

    A friend plays video games 6 hours a day and gets upset when called to dinner with the family. This is a sign of? (a)anxiety disorder (b)a phobia (c)bipolar disorder (d)impulse control disorder

    asked on December 31, 2014
  74. math

    a city is served by two newspapers-the Tribune and the Daily News. Each Sunday a reader purchases one of the newspapers at a stand. The following transition matrix contains the probabilities of a customers buying a particular newspaper in a week given the

    asked on November 14, 2014
  75. Algebra please help out

    In each bouquet of flowers, there are 4 roses and 6 white carnations. Complete the 4 and 6 table to find out how many roses and carnations there are in 4 bouquets of flowers? Please help answer

    asked on October 29, 2014
  76. epidemiology

    In another study, the smoking habits of 34,445 male physicians were obtained by mailed questionnaires. Deaths among these physicians over the subsequent years were identified though contact with the office of the Registrar General. The death rates from

    asked on April 27, 2014
  77. Math

    Archaeologists often find only parts of ancient human remains. For example, they may find a small finger bone, called the metacarpal bone. Is it possible to predict the height of a human from the length of his or her metacarpal bone? To investigate, a

    asked on February 20, 2014
  78. Algebra

    I need to know how to factor these in A-C method form 2a^2+1+3a 9w-w^3

    asked on October 31, 2013
  79. Algebra

    graph the line with slope -2/3 passing through (-5, -5)

    asked on October 20, 2013
  80. Algebra

    0.05(0.3m+35n)-0.8(0.09n-22m)

    asked on October 5, 2013
  81. Algebra

    2w-3+3(w-4)-5(w-6)

    asked on October 5, 2013
  82. Algebra

    -2w-3+3(w-4)-5(w-6)

    asked on October 5, 2013
  83. Phyics

    A model rocket blasts off from the ground, rising straight upward with a constant acceleration that has a magnitude of 75.5 m/s2 for 1.58 seconds, at which point its fuel abruptly runs out. Air resistance has no effect on its flight. What maximum altitude

    asked on September 25, 2013
  84. Accounting

    You received an email from Carl the operations manager from the California Container division. They produce packaging for cell phones. Carl understands that his product is an important cash producer for the company. •The delivery price is based on long

    asked on September 24, 2013
  85. Math

    A 120m cable TV tower casts a 96m shadow. Find the height of a nearby telephone pole that cast a 16m shadow.

    asked on August 27, 2013
  86. math check

    Find the critical value for the hypothesis test, given the following. (Give your answer correct to two decimal places.) Ha: ó1 > ó2, with n1 = 8, n2 = 10, and á = 0.025 F = 2.6 .

    asked on June 28, 2013
  87. math check

    Consider the following ANOVA experiments. (Give your answers correct to two decimal places.) (a) Determine the critical region and critical value that are used in the classical approach for testing the null hypothesis Ho: ì1 = ì2 = ì3 = ì4, with n = 19

    asked on June 28, 2013
  88. Math

    Use the following table to answer the questions. (Give your answers correct to two decimal places.) x 1 1 3 3 5 5 7 7 9 9 y 3 2 6 1 3 3 3 2 5 3 (a) Find the equation of the line of best fit. y hat = + x (ii) Graph this equation on a scatter diagram. (Do

    asked on June 28, 2013
  89. math help

    Use the following table to answer the questions. (Give your answers correct to two decimal places.) x 1 1 3 3 5 5 7 7 9 9 y 3 2 6 1 3 3 3 2 5 3 (a) Find the equation of the line of best fit. y hat = + x (ii) Graph this equation on a scatter diagram. (Do

    asked on June 26, 2013
  90. Math question

    How do you find the p-value, on a problem like below. The corrosive effects of various soils on coated and uncoated steel pipe was tested by using a dependent sampling plan. The data collected are summarized below, where d is the amount of corrosion on the

    asked on June 25, 2013
  91. statistics

    Consider the following bivariate data. Point A B C D E F G H I J x 3 4 2 1 7 2 1 0 4 2 y 1 7 3 3 6 6 5 0 6 2 (b) Calculate the covariance. (Give your answer correct to two decimal places.) (c) Calculate sx and sy. (Give your answers correct to three

    asked on June 23, 2013
  92. chemistry

    the equilibrium constant for the synthesis of HBr(g0 from hydrogen and bromine gas is 2.18*10 exponent 6 at 730 degrees celcius.if 3.75 mol of HBr(g) is put into a 15L reaction vessel,calculate the concentration of H2,Br2 and HBr at equilibrium

    asked on April 2, 2013
  93. STAT

    An independent-measures research study compares three treatment conditions with a sample of n = 10 in each condition. The sample means are M1 = 2, M2 = 3, and M3 = 7 a. Compute SS for the set of 3 treatment means. (Use the three means as a set of n = 3

    asked on February 24, 2013
  94. chem

    a.) At equilibrium, the molar concentrations for reactants and products are found to be [I2] = 0.50 M,[Cl2] = 0.60 M, and [ICl] = 5.0 M. What is the equilibrium constant (Kc) for this reaction? b.) The concentration of I2 is increased to 1.5 M, disrupting

    asked on November 19, 2012
  95. algebra

    The price of a small cabin is $85000 the bank requires a 5% down payment the buyer is offered two mortgage options: 20 year fixed at 9.5% or 30 year fixed at 9.5% calculate the amount of interest paid for each option how much does the buyer save in

    asked on November 7, 2012
  96. CHEM

    what volume would 10.5g of nitrogen gas, N2, occupy at 200.K and 2.02atm?

    asked on November 2, 2012
  97. chem

    A sample containing 6.40 g O2 gas has a volume of 15.0 L. Pressure and temperature remain constant. a. What is the new volume if 0.600 mole O2 gas is added? b. Oxygen is released until the volume is 12.0L. How many moles of O2 are removed? c. What is the

    asked on November 1, 2012
  98. chem

    How are we able to determine that jupiter is mostly methane gas and that the surface of the sun is mostly He and H? can anyone help me pls

    asked on October 30, 2012
  99. chem

    How are we able to determine that jupiter is mostly methane gas and that the surface of the sun is mostly He and H? can anyone help me pls.

    asked on October 30, 2012
  100. chem

    if a car produces 81g of {\rm CO_2}, how many grams of {\rm O_2} are used up in the reaction? the complete chem reaction is C2H6O+3O2--->2CO2+3H2O

    asked on October 19, 2012

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